6737-04-02 - Miller Smith 1/4 NPT Male to 1/8 NPT Female Brass Bushing

Get the Right Fit for Your Gas Rig

Every welder knows the frustration of having a gauge, hose, or fitting that just won't fit the port on their regulator or manifold. The Miller Smith 6737-04-02 Bushing is the simple, durable solution to that problem. This handy adapter allows you to step down a 1/4-inch NPT port to accept a 1/8-inch NPT fitting. It’s a small part, but it plays a huge role in getting your shop set up correctly and safely.

When you are dealing with shielding gas for MIG and TIG welding, or oxy-fuel setups for cutting and brazing, leaks are not an option. A leak means wasted gas, poor weld quality due to porosity, and potential safety hazards. This bushing is made from solid brass, the industry standard for gas fittings because it doesn't rust easily and stands up to the wear and tear of a busy shop. The threads are cut cleanly and accurately, meaning they bite in securely and hold tight. Unlike cheap, soft fittings that might cross-thread or crack under torque, this Miller Smith component is built to last.

Common Applications in the Shop:

• Regulator Repair: Adapting a new high-pressure or low-pressure gauge with a 1/8" stem to a regulator body with a 1/4" port.
• Manifold Systems: Reducing outlet ports on gas distribution blocks to fit smaller hoses or flashback arrestors.
• Custom Setups: Building out custom purge lines or testing equipment where thread sizes vary.

Don't rely on mystery-metal fittings from the hardware store bin for your welding equipment. Stick with genuine Miller Smith parts to ensure compatibility and safety. This bushing installs easily with a standard wrench—just remember to apply a little thread tape or sealant to the male threads for a perfect seal. Keep a few of these in your parts drawer; you never know when you'll need to make a connection work on the fly.